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The Encyclopedia of Horology

Wristwatch · Chronograph wristwatch

Breitling for Bentley Motors 30-Seconds Chronograph

Partially verified

This Breitling wristwatch, identified as a Bentley Motors 30-Seconds Chronograph, was manufactured in 2003 as a special edition marking the collaboration between Breitling and Bentley, specifically commemorating the brand's participation in the 24 Hours of Le Mans. The timepiece is an oversized model constructed from 18K yellow gold, including an integrated 18K yellow gold bracelet. It features a water-resistant, three-body polished case with lapidated lugs, a bi-directional rotating bezel designed for slide-rule operations, and a case back embossed with the Bentley logo. Power is provided by a self-winding mechanical Calibre 25 movement with 38 jewels, shock-absorption, and a micrometer regulator. The watch is presented as an officially certified chronometer. The assembly includes a date aperture, a chronograph mechanism with 12-hour and 30-minute registers, and an outer tachometer scale.

Front view of the Breitling for Bentley Motors 30-Seconds Chronograph showing the black and silver dial, gold case, and gold bracelet.
Front view of the Breitling for Bentley Motors 30-Seconds Chronograph showing the black and silver dial, gold case, and gold bracelet. — Antiquorum. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
catalog.antiquorum.swiss
Category
Wristwatch · Chronograph wristwatch
Maker / attribution
Breitling, Genève
Reference
K 25362
Catalogue / lot identifier
101
Source-reported date
2003
Source-reported place
Switzerland
Source-reported serial
713907

Source-reported attribution and specifications are not independent authentication. A listing does not establish present ownership, current display, availability or permission to reproduce.

Object description

Case and Dial Design

The timepiece features a large-format three-body case measuring 45 mm in diameter, manufactured from 18K yellow gold. The construction includes polished surfaces, lapidated lugs, and a bi-directional rotating bezel, which provides the necessary mechanism for operating the integrated slide-rule function. The design also incorporates a helium escape valve and a screwed-down case back, the latter of which bears an embossed Bentley logo.

The dial uses a bi-color black and matte silver configuration. It displays subsidiary registers for 12-hour and 30-minute intervals and a small seconds indicator. Hour markers consist of yellow gold indexes paired with luminous square dots, matched by luminous 'bâton' hands. A date aperture is positioned between the 4 and 5 o'clock markers, while the periphery of the dial includes both the tachometer scale and the revolving slide-rule graduations.

Evidence for this section
  • “Three-body, solid, polished, bi-directional rotating bezel to operate the slide-rule, screwed-down case back and crown, case back embossed with the Bentley logo, helium escape valve, lapidated lugs, sapphire crystal.”
  • “Bi-color black and matte silver with yellow gold indexes and luminous square dots, subsidiary dials for the seconds, the 12-hour and 30-minute registers, outer tachometer and revolving slide-rule graduations, aperture for the date between 4 and 5.”

Movement and Mechanics

The watch is driven by a rhodium-plated Calibre 25 movement, which is self-winding and features 38 jewels. The mechanical structure includes a straight-line lever escapement and a monometallic balance. To ensure chronometric precision, the movement is equipped with a self-compensating flat balance-spring, a micrometer regulator for rate adjustments, and an integrated shock-absorption system.

The movement is signed by the manufacturer, consistent with the signing found on the dial and case. It functions as an officially certified chronometer, reflecting the manufacturer's standards for precision timekeeping. The watch is designed for water resistance, supported by the use of a screwed-down crown and case back.

Evidence for this section
  • “Cal. 25, rhodium plated, 38 jewels, straight line lever escapement, monometallic balance, shock-absorber, self-compensating flat balance-spring, micrometer regulator.”
  • “Officially Certified Chronometer”
  • “Dial, case and movement signed.”

Provenance and Production

This watch was produced in 2003 as part of a special edition series. The production was intended to acknowledge two specific corporate associations: the celebration of the collaboration between Breitling and Bentley, and the commemoration of Bentley’s involvement in the 24 Hours of Le Mans endurance races.

The timepiece is categorized as an oversized wristwatch and is supplied with a fitted box and a certificate of authenticity. The auction description assigns specific grading levels to the case, dial, and movement, characterizing the overall condition as very good.

Evidence for this section
  • “Made in a Special Edition in 2003 to commemorate Bentley's participation in the '24 Hours of Le Mans' races and to celebrate its collaboration with Breitling.”
  • “Accompanied by a fitted box and certificate.”
  • “Grading System Grade: AA Very good”

Open research questions

  • What is the specific functionality of the '30-seconds' chronograph mechanism compared to a standard 60-second central chronograph hand?
  • How does the helium escape valve integrated into this specific model function given the 18K gold case construction?

Source evidence

Recorded claims and source quotations for Breitling for Bentley Motors 30-Seconds Chronograph
FieldSource-reported valueSource quotation
MakerBreitling, Genève“Breitling, Genève”
ModelBentley Motors - 30-Seconds Chronograph“Bentley Motors - 30-Seconds Chronograph”
Case Material18K yellow gold“18K yellow gold”
MovementCalibre 25, self-winding, 38 jewels“Cal. 25, rhodium plated, 38 jewels”
Case Diameter45 mm“Diam. 45 mm”
FunctionsChronograph, date, tachometer, slide-rule“round button chronograph, registers, tachometer, date, slide-rule”
Serial Number713907“case No. 713907”

Visible details

  • Bi-color black and matte silver dial
  • Knurled texture on the rotating bezel
  • Luminous applied hour markers and hands
  • Date window located between the 4 and 5 o'clock positions

Research qualifications

  • Condition grading for case and movement are stated as separate values by the auction house.
  • The inclusion of the certificate and box is reported by the auction source but not visually verified in the provided image.

Photograph identity and source facts were screened before import; rights clearance remains pending.

Consulted source

'30-Seconds Chronograph" Breitling, Genève, for "Bentley Motors - 30-Seconds Chronograph", Officially Certified Chronometer, No. K 25362, case No. 713907. Made in a Special Edition in 2003 to commemorate Bentley's participation in the '24 Hours of Le Mans' races and to celebrate its collaboration with Breitling. Accompanied by a fitted box and certificate. Fine and rare, oversized, self-winding, water-resistant, 18K yellow gold gentleman's wristwatch with round button chronograph, registers, tachometer, date, slide-rule and an 18K yellow gold Breitling bracelet. Accompanied by a fitted box and certificate.

Reviewed 2026-10-26 · Record 14374bc813

Terms in this record

Glossary explanations for terms named in this object’s record.

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